Amber Smalltalk version 0.13
In this project I'd like to open the class browser with a specific class.
<button onClick="amber.globals.Browser._openOn_(amber.globals.ProcessingClock)">ProcessingClock class
I get the error message amber not defined (see screen shot below).
Question How do I open the browser properly?

Of course it is not defined,
amberis just a local variable (that is, a parameter) of the loader callback function. Either remember it to some global and reuse in button onclick code (ugly), install onclick handler on the button directly inside loader callback, where you have access toambervariable (probably clumsy, but the most clean), or userequire('amber/helpers')instead ofamberin direct onclick handlers (in your example you want need to use it twice).